mine stopped at 13 wks and and has came back every once in a while since week 15
Try the pedia lyte Popsicle or the regular icees as I call them they helped A LOT!!
For me it stopped right when I started my 2nd trimester around either 12 or 13 weeks (:
til i was 13 weeks with this one. and with my first i only felt nauseous for like a month with my first and only puked twice.
6-17 weeks